Jellyfish, genus Aurelia (Image 1)

Jellyfish, genus Aurelia, associated with commercial fish populations. To learn more about the basics of jellyfish biology, what scientists have learned thus far about the worldwide increase in jellyfish populations, and the causes of jellyfish swarms and how they effect both human and marine life, see the NSF Special Report, "Jellyfish Gone Wild!" (Date of Image: February 2007) [Image 1 of 4 related images. See Image 2.]